src/dolphincolumnview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2007-2009 by Peter Penz <peter.penz@gmx.at>             *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program is distributed in the hope that it will be useful,       *
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "dolphincolumnview.h"
  21
  22 #include "dolphinmodel.h"
  23 #include "dolphincolumnviewcontainer.h"
  24 #include "dolphincontroller.h"
  25 #include "dolphindirlister.h"
  26 #include "dolphinsortfilterproxymodel.h"
  27 #include "settings/dolphinsettings.h"
  28 #include "dolphinviewautoscroller.h"
  29 #include "dolphin_columnmodesettings.h"
  30 #include "dolphin_generalsettings.h"
  31 #include "draganddrophelper.h"
  32 #include "folderexpander.h"
  33 #include "tooltips/tooltipmanager.h"
  34 #include "viewextensionsfactory.h"
  35 #include "zoomlevelinfo.h"
  36
  37 #include <kcolorscheme.h>
  38 #include <kdirlister.h>
  39 #include <kfileitem.h>
  40 #include <kio/previewjob.h>
  41 #include <kiconeffect.h>
  42 #include <kjob.h>
  43 #include <konqmimedata.h>
  44
  45 #include <QApplication>
  46 #include <QClipboard>
  47 #include <QPainter>
  48 #include <QPoint>
  49 #include <QScrollBar>
  50
  51 DolphinColumnView::DolphinColumnView(QWidget* parent,
  52                                      DolphinColumnViewContainer* container,
  53                                      const KUrl& url) :
  54     QListView(parent),
  55     m_active(false),
  56     m_container(container),
  57     m_extensionsFactory(0),
  58     m_url(url),
  59     m_childUrl(),
  60     m_font(),
  61     m_decorationSize(),
  62     m_dirLister(0),
  63     m_dolphinModel(0),
  64     m_proxyModel(0),
  65     m_dropRect()
  66 {
  67     setMouseTracking(true);
  68     setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  69     setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
  70     setSelectionBehavior(SelectItems);
  71     setSelectionMode(QAbstractItemView::ExtendedSelection);
  72     setDragDropMode(QAbstractItemView::DragDrop);
  73     setDropIndicatorShown(false);
  74     setSelectionRectVisible(true);
  75     setEditTriggers(QAbstractItemView::NoEditTriggers);
  76
  77     setVerticalScrollMode(QListView::ScrollPerPixel);
  78     setHorizontalScrollMode(QListView::ScrollPerPixel);
  79
  80     // apply the column mode settings to the widget
  81     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
  82     Q_ASSERT(settings != 0);
  83
  84     if (settings->useSystemFont()) {
  85         m_font = KGlobalSettings::generalFont();
  86     } else {
  87         m_font = QFont(settings->fontFamily(),
  88                        settings->fontSize(),
  89                        settings->fontWeight(),
  90                        settings->italicFont());
  91     }
  92
  93     activate();
  94
  95     connect(this, SIGNAL(viewportEntered()),
  96             m_container->m_controller, SLOT(emitViewportEntered()));
  97     connect(this, SIGNAL(entered(const QModelIndex&)),
  98             this, SLOT(slotEntered(const QModelIndex&)));
  99
 100     const DolphinView* dolphinView = m_container->m_controller->dolphinView();
 101     connect(dolphinView, SIGNAL(showPreviewChanged()),
 102             this, SLOT(slotShowPreviewChanged()));
 103
 104     m_dirLister = new DolphinDirLister();
 105     m_dirLister->setAutoUpdate(true);
 106     m_dirLister->setMainWindow(window());
 107     m_dirLister->setDelayedMimeTypes(true);
 108     const bool showHiddenFiles = m_container->m_controller->dolphinView()->showHiddenFiles();
 109     m_dirLister->setShowingDotFiles(showHiddenFiles);
 110
 111     m_dolphinModel = new DolphinModel(this);
 112     m_dolphinModel->setDirLister(m_dirLister);
 113     m_dolphinModel->setDropsAllowed(DolphinModel::DropOnDirectory);
 114
 115     m_proxyModel = new DolphinSortFilterProxyModel(this);
 116     m_proxyModel->setSourceModel(m_dolphinModel);
 117     m_proxyModel->setFilterCaseSensitivity(Qt::CaseInsensitive);
 118
 119     m_proxyModel->setSorting(dolphinView->sorting());
 120     m_proxyModel->setSortOrder(dolphinView->sortOrder());
 121     m_proxyModel->setSortFoldersFirst(dolphinView->sortFoldersFirst());
 122
 123     setModel(m_proxyModel);
 124
 125     connect(KGlobalSettings::self(), SIGNAL(kdisplayFontChanged()),
 126             this, SLOT(updateFont()));
 127
 128     DolphinController* controller = m_container->m_controller;
 129     connect(controller, SIGNAL(zoomLevelChanged(int)),
 130             this, SLOT(setZoomLevel(int)));
 131
 132     const QString nameFilter = controller->nameFilter();
 133     if (!nameFilter.isEmpty()) {
 134         m_proxyModel->setFilterFixedString(nameFilter);
 135     }
 136
 137     updateDecorationSize(dolphinView->showPreview());
 138     m_extensionsFactory = new ViewExtensionsFactory(this, controller);
 139 }
 140
 141 DolphinColumnView::~DolphinColumnView()
 142 {
 143     delete m_proxyModel;
 144     m_proxyModel = 0;
 145     delete m_dolphinModel;
 146     m_dolphinModel = 0;
 147     m_dirLister = 0; // deleted by m_dolphinModel
 148 }
 149
 150 void DolphinColumnView::setActive(bool active)
 151 {
 152     if (active && (m_container->focusProxy() != this)) {
 153         m_container->setFocusProxy(this);
 154     }
 155
 156     if (m_active != active) {
 157         m_active = active;
 158
 159         if (active) {
 160             activate();
 161         } else {
 162             deactivate();
 163         }
 164     }
 165 }
 166
 167 void DolphinColumnView::updateBackground()
 168 {
 169     // TODO: The alpha-value 150 is copied from DolphinView::setActive(). When
 170     // cleaning up the cut-indication of DolphinColumnView with the code from
 171     // DolphinView a common helper-class should be available which can be shared
 172     // by all view implementations -> no hardcoded value anymore
 173     const QPalette::ColorRole role = viewport()->backgroundRole();
 174     QColor color = viewport()->palette().color(role);
 175     color.setAlpha((m_active && m_container->m_active) ? 255 : 150);
 176
 177     QPalette palette = viewport()->palette();
 178     palette.setColor(role, color);
 179     viewport()->setPalette(palette);
 180
 181     update();
 182 }
 183
 184 KFileItem DolphinColumnView::itemAt(const QPoint& pos) const
 185 {
 186     KFileItem item;
 187     const QModelIndex index = indexAt(pos);
 188     if (index.isValid() && (index.column() == DolphinModel::Name)) {
 189         const QModelIndex dolphinModelIndex = m_proxyModel->mapToSource(index);
 190         item = m_dolphinModel->itemForIndex(dolphinModelIndex);
 191     }
 192     return item;
 193 }
 194
 195 void DolphinColumnView::setSelectionModel(QItemSelectionModel* model)
 196 {
 197     // If a change of the selection is done although the view is not active
 198     // (e. g. by the selection markers), the column must be activated. This
 199     // is done by listening to the current selectionChanged() signal.
 200     if (selectionModel() != 0) {
 201         disconnect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 202                    this, SLOT(requestActivation()));
 203     }
 204
 205     QListView::setSelectionModel(model);
 206
 207     connect(selectionModel(), SIGNAL(selectionChanged(QItemSelection, QItemSelection)),
 208             this, SLOT(requestActivation()));
 209 }
 210
 211 QStyleOptionViewItem DolphinColumnView::viewOptions() const
 212 {
 213     QStyleOptionViewItem viewOptions = QListView::viewOptions();
 214     viewOptions.font = m_font;
 215     viewOptions.fontMetrics = QFontMetrics(m_font);
 216     viewOptions.decorationSize = m_decorationSize;
 217     viewOptions.showDecorationSelected = true;
 218     return viewOptions;
 219 }
 220
 221 void DolphinColumnView::startDrag(Qt::DropActions supportedActions)
 222 {
 223     DragAndDropHelper::instance().startDrag(this, supportedActions, m_container->m_controller);
 224 }
 225
 226 void DolphinColumnView::dragEnterEvent(QDragEnterEvent* event)
 227 {
 228     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 229         event->acceptProposedAction();
 230         requestActivation();
 231     }
 232 }
 233
 234 void DolphinColumnView::dragLeaveEvent(QDragLeaveEvent* event)
 235 {
 236     QListView::dragLeaveEvent(event);
 237     setDirtyRegion(m_dropRect);
 238 }
 239
 240 void DolphinColumnView::dragMoveEvent(QDragMoveEvent* event)
 241 {
 242     QListView::dragMoveEvent(event);
 243
 244     // TODO: remove this code when the issue #160611 is solved in Qt 4.4
 245     const QModelIndex index = indexAt(event->pos());
 246     setDirtyRegion(m_dropRect);
 247
 248     m_dropRect.setSize(QSize()); // set as invalid
 249     if (index.isValid()) {
 250         m_container->m_controller->setItemView(this);
 251         const KFileItem item = m_container->m_controller->itemForIndex(index);
 252         if (!item.isNull() && item.isDir()) {
 253             m_dropRect = visualRect(index);
 254         }
 255     }
 256     setDirtyRegion(m_dropRect);
 257
 258     if (DragAndDropHelper::instance().isMimeDataSupported(event->mimeData())) {
 259         // accept url drops, independently from the destination item
 260         event->acceptProposedAction();
 261     }
 262 }
 263
 264 void DolphinColumnView::dropEvent(QDropEvent* event)
 265 {
 266     const QModelIndex index = indexAt(event->pos());
 267     m_container->m_controller->setItemView(this);
 268     const KFileItem item = m_container->m_controller->itemForIndex(index);
 269     m_container->m_controller->indicateDroppedUrls(item, url(), event);
 270     QListView::dropEvent(event);
 271 }
 272
 273 void DolphinColumnView::paintEvent(QPaintEvent* event)
 274 {
 275     if (!m_childUrl.isEmpty()) {
 276         // indicate the shown URL of the next column by highlighting the shown folder item
 277         const QModelIndex dirIndex = m_dolphinModel->indexForUrl(m_childUrl);
 278         const QModelIndex proxyIndex = m_proxyModel->mapFromSource(dirIndex);
 279         if (proxyIndex.isValid() && !selectionModel()->isSelected(proxyIndex)) {
 280             const QRect itemRect = visualRect(proxyIndex);
 281             QPainter painter(viewport());
 282             QColor color = KColorScheme(QPalette::Active, KColorScheme::View).foreground().color();
 283             color.setAlpha(32);
 284             painter.setPen(Qt::NoPen);
 285             painter.setBrush(color);
 286             painter.drawRect(itemRect);
 287         }
 288     }
 289
 290     QListView::paintEvent(event);
 291 }
 292
 293 void DolphinColumnView::mousePressEvent(QMouseEvent* event)
 294 {
 295     requestActivation();
 296     if (!indexAt(event->pos()).isValid()) {
 297         if (QApplication::mouseButtons() & Qt::MidButton) {
 298             m_container->m_controller->replaceUrlByClipboard();
 299         }
 300     } else if (event->button() == Qt::LeftButton) {
 301         // TODO: see comment in DolphinIconsView::mousePressEvent()
 302         setState(QAbstractItemView::DraggingState);
 303     }
 304     QListView::mousePressEvent(event);
 305 }
 306
 307 void DolphinColumnView::keyPressEvent(QKeyEvent* event)
 308 {
 309     QListView::keyPressEvent(event);
 310     requestActivation();
 311
 312     DolphinController* controller = m_container->m_controller;
 313     controller->handleKeyPressEvent(event);
 314     switch (event->key()) {
 315     case Qt::Key_Right: {
 316         // Special key handling for the column: A Key_Right should
 317         // open a new column for the currently selected folder.
 318         const QModelIndex index = currentIndex();
 319         const KFileItem item = controller->itemForIndex(index);
 320         if (!item.isNull() && item.isDir()) {
 321             controller->emitItemTriggered(item);
 322         }
 323         break;
 324     }
 325
 326     case Qt::Key_Escape:
 327         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(),
 328                                           QItemSelectionModel::Current |
 329                                           QItemSelectionModel::Clear);
 330         break;
 331
 332     default:
 333         break;
 334     }
 335 }
 336
 337 void DolphinColumnView::contextMenuEvent(QContextMenuEvent* event)
 338 {
 339     if (!m_active) {
 340         m_container->requestActivation(this);
 341         Q_ASSERT(m_container->m_controller->itemView() == this);
 342         m_container->m_controller->triggerUrlChangeRequest(m_url);
 343     }
 344     Q_ASSERT(m_active);
 345
 346     QListView::contextMenuEvent(event);
 347     m_container->m_controller->triggerContextMenuRequest(event->pos());
 348 }
 349
 350 void DolphinColumnView::wheelEvent(QWheelEvent* event)
 351 {
 352     const int step = m_decorationSize.height();
 353     verticalScrollBar()->setSingleStep(step);
 354     QListView::wheelEvent(event);
 355 }
 356
 357 void DolphinColumnView::leaveEvent(QEvent* event)
 358 {
 359     QListView::leaveEvent(event);
 360     // if the mouse is above an item and moved very fast outside the widget,
 361     // no viewportEntered() signal might be emitted although the mouse has been moved
 362     // above the viewport
 363     m_container->m_controller->emitViewportEntered();
 364 }
 365
 366 void DolphinColumnView::currentChanged(const QModelIndex& current, const QModelIndex& previous)
 367 {
 368     QListView::currentChanged(current, previous);
 369     m_extensionsFactory->handleCurrentIndexChange(current, previous);
 370 }
 371
 372 void DolphinColumnView::setZoomLevel(int level)
 373 {
 374     const int size = ZoomLevelInfo::iconSizeForZoomLevel(level);
 375     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 376
 377     const bool showPreview = m_container->m_controller->dolphinView()->showPreview();
 378     if (showPreview) {
 379         settings->setPreviewSize(size);
 380     } else {
 381         settings->setIconSize(size);
 382     }
 383
 384     updateDecorationSize(showPreview);
 385 }
 386
 387 void DolphinColumnView::slotEntered(const QModelIndex& index)
 388 {
 389     m_container->m_controller->setItemView(this);
 390     m_container->m_controller->emitItemEntered(index);
 391 }
 392
 393 void DolphinColumnView::requestActivation()
 394 {
 395     m_container->m_controller->setItemView(this);
 396     m_container->m_controller->requestActivation();
 397     if (!m_active) {
 398         m_container->requestActivation(this);
 399         m_container->m_controller->triggerUrlChangeRequest(m_url);
 400         selectionModel()->clear();
 401     }
 402 }
 403
 404 void DolphinColumnView::updateFont()
 405 {
 406     const ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 407     Q_ASSERT(settings != 0);
 408
 409     if (settings->useSystemFont()) {
 410         m_font = KGlobalSettings::generalFont();
 411     }
 412 }
 413
 414 void DolphinColumnView::slotShowPreviewChanged()
 415 {
 416     const DolphinView* view = m_container->m_controller->dolphinView();
 417     updateDecorationSize(view->showPreview());
 418 }
 419
 420 void DolphinColumnView::activate()
 421 {
 422     setFocus(Qt::OtherFocusReason);
 423
 424     if (KGlobalSettings::singleClick()) {
 425         connect(this, SIGNAL(clicked(const QModelIndex&)),
 426                 m_container->m_controller, SLOT(triggerItem(const QModelIndex&)));
 427     } else {
 428         connect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 429                 m_container->m_controller, SLOT(triggerItem(const QModelIndex&)));
 430     }
 431
 432     if (selectionModel() && selectionModel()->currentIndex().isValid()) {
 433         selectionModel()->setCurrentIndex(selectionModel()->currentIndex(), QItemSelectionModel::SelectCurrent);
 434     }
 435
 436     updateBackground();
 437 }
 438
 439 void DolphinColumnView::deactivate()
 440 {
 441     clearFocus();
 442     if (KGlobalSettings::singleClick()) {
 443         disconnect(this, SIGNAL(clicked(const QModelIndex&)),
 444                    m_container->m_controller, SLOT(triggerItem(const QModelIndex&)));
 445     } else {
 446         disconnect(this, SIGNAL(doubleClicked(const QModelIndex&)),
 447                    m_container->m_controller, SLOT(triggerItem(const QModelIndex&)));
 448     }
 449
 450     const QModelIndex current = selectionModel()->currentIndex();
 451     selectionModel()->clear();
 452     selectionModel()->setCurrentIndex(current, QItemSelectionModel::NoUpdate);
 453     updateBackground();
 454 }
 455
 456 void DolphinColumnView::updateDecorationSize(bool showPreview)
 457 {
 458     ColumnModeSettings* settings = DolphinSettings::instance().columnModeSettings();
 459     const int iconSize = showPreview ? settings->previewSize() : settings->iconSize();
 460     const QSize size(iconSize, iconSize);
 461     setIconSize(size);
 462
 463     m_decorationSize = size;
 464
 465     doItemsLayout();
 466 }
 467
 468 #include "dolphincolumnview.moc"